Question

pakshi par vigyapan in hindi​

Answer 1

$\huge {\bold {\textsf{\underline{Answer :-}}}}$

$\textsf {\green { Let the First of an A.P be "a" and Common difference be "d"}}$

$\textsf {\red{As per Question :-}}$

a + 7d = 17 ...... (1)

a + 18d = 39 ..... (2)

$\rule {300}{1}$

- 11d = - 22

d = 2